Fracture toughness estimation for the TMJ disc

Kittisak Koombua, Ramana M. Pidaparti, Mark W Beatty

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

J contour integral fracture toughness of the temporomandibular (TMJ) disc was estimated from a computational model based on fracture load data derived from experimental tests. The computational model involved a stress analysis of TMJ disc specimens with cracks oriented parallel and perpendicular to the primary collagen fiber axis within the intermediate zone of the disc. The results demonstrated differences occurred between crack orientations when an orthotropic model was used. Fracture toughness was much lower for a crack oriented parallel to the collagen fiber direction than that for a crack oriented perpendicularly. Thickness, crack size, and anisotropy ratio were observed as additional variables affecting the fracture toughness of the TMJ disc. Future model enhancements may be achieved by considering the poroviscoelastic nature of the TMJ disc.

Original languageEnglish (US)
Pages (from-to)566-573
Number of pages8
JournalJournal of Biomedical Materials Research - Part A
Volume79
Issue number3
DOIs
StatePublished - Dec 1 2006

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Fracture toughness
Cracks
Collagen
Fibers
Stress analysis
Anisotropy
Temporomandibular Joint

Keywords

  • Finite element model
  • Fracture toughness
  • J contour integral
  • Orthotropic material model
  • TMJ disc

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

Cite this

Fracture toughness estimation for the TMJ disc. / Koombua, Kittisak; Pidaparti, Ramana M.; Beatty, Mark W.

In: Journal of Biomedical Materials Research - Part A, Vol. 79, No. 3, 01.12.2006, p. 566-573.

Research output: Contribution to journalArticle

Koombua, Kittisak ; Pidaparti, Ramana M. ; Beatty, Mark W. / Fracture toughness estimation for the TMJ disc. In: Journal of Biomedical Materials Research - Part A. 2006 ; Vol. 79, No. 3. pp. 566-573.
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